Salish sucker and Nooksack dace are undescribed and endangered members of a unique assemblage of freshwater fish that survived continental glaciation in an ice-free refuge in Washington state. Canadian populations are limited to a small number of headwater streams in the Fraser Valley and are in steep decline. This report summarizes existing knowledge of the life history of both. Where deficient, life history information is supplemented with that on the closely related longnose sucker (Catostomus catostomus) and longnose dace (Rhinichthys cataractae).
Pearson, Mike. 1998. A Review of the Distribution, Status and Biology of the Endangered Salish Sucker (Catostmus sp.) and Nooksack Dace (Rhinichthys sp.). Fisheries Technical Circular. FTC101